Another hard math problem???
In this one you have to try to generalize to an arbitrary(have no clue what that is?!!) rectangular window frame. That is, get a formula in terms of M and N for the amount of wood stripe needed for the frame of an M by N window.
You may need to gather data about a variety of examples into an In-Out table and then look for a pattern in your data. If so, once you gather data, look for a algebraic rule that describes your table.
Favorite Answer
If a window is N by M the frame will sit on the outside of that. The ammount of wood you would need would be answered in the formula below.
Assuming that W is the width of the frame, you can make the following observations:
1: (N+W)*(M+W) is the area of large rectangle that would be made once you add in the width of the frame itself
2: N*M is the area of the window that is window and not frame.
Subtract those factors and you have the area of the frame.
((N+W)*(M+W))-(N*M) = Area of the wood frame.
Unless you know the width of the frame, you need the 3rd variable.
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